Per 
Item #: SCP-5975
Object Class:Euclid Keter
Special Containment Procedures: SCP-5975 is to be surrounded by 2 rows of electrified fence with the perimeter if 1000 meters with the entrance to SCP-5975 being at the geometrical middle of the fence. There will be constant patrols surrounding the perimeter with no fewer than 3 armed guards. Every non-authorised personel entering the area of the fence will be terminated on sight.
Description: SCP-5975 is a semingly abandoned underground lab 1 km deep, SCP-5975 displays multiple reality bending properties but not reserved to: room shifting, teleportation of entities located within the compound at diferent rooms rgardless of placement. A black corrosive substance can be found secreting from T shapef hallways exclusevly. As descended further heavier and heavier reality alterations can be found such as: hallucinations, room dissapearance, doors that lead to nowhere and potentially, rooms made out of flesh. Inside SCP-5975can be found multiple research rooms with skin samples of SCP's thats are already in foundation custody such as: SCP-682, SCP-076,SCP-3000, SCP-3200. Below 300 meters SCP-5975-1 can be found. SCP-5975-1 are humanoid figures with a blood red color and resembling a form of antlers growing out of the temporal bones, varying in size and weight, SCP-5975-1 will be neutral towards all life unless provoked. If provoked, all instances of SCP-5975-1 will turm hostile to all beings from the species the provoker was from and will seek to exterminate the entire species of the provoker within the compound.
Addendum:
Addendum-1:
Test subjects: 2 D-class personel
The 2 D class personel were instructed to enter and go as deep as possible.
Contact lost at 200 meters.
Presumed lost
Addendum-2
Test subjects 3 armed guards
Instructed to bring an instance of SCP-5975-1 in alive for dissection
Test failed. Only 1 guard came back
Addendum-3
RC ground drone was sent to record instances of SCP-5975
Lost in anomaly room
Test deemed a failure
Addendum-4
RC ground drone sent to record istances of SCP-5975-1 again
2 instances of SCP-5375-1 were observed engaging in some sort of ritual that lasted [Redacted] hours. At the end a third and fourth instance appeared seemingly from the ground.
Test deemed a success.
Object class changed to Keter
